| Primary satellite | Secondary satellite |
| Name | Cosmos 1603 | FENGYUN 1C DEB |
| Spacetrack catalog number | 15333 | 30547 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 25 11:40 | 2021 Jan 25 14:50 |
| Time of closest approach (UTC) | 2020 Dec 04 00:27:28.821 |
| Minimum distance | 112.200 km |
| Height difference | 4.988 km |
| Relative speed | 14.048 km/s |
| Angle between velocity vectors | 142° |
| Geographic position | 67.9°N, 4.1°E |
| Height | 844 km |
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